Hi jjknknl,
This document may help if you are using SAS functions: https://www.sas.com/content/dam/SAS/en_ca/User%20Group%20Presentations/TASS/fogarasi_fuzzy_matching.pdf
If you have SAS Data Quality, you can refer to this document. See PROC DQMATCH and the DQMATCH function: https://go.documentation.sas.com/?cdcId=dqcdc&cdcVersion=3.4&docsetId=dqclref&docsetTarget=titlepage.htm&locale=en
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